Hydraulics and Fluid Mechanics in ME
Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as

Drag
Bulk modulus
Lift
Stagnation pressure

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Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Length of both the pipes is same
Loss of head and discharge of both the pipes is same
Diameter of both the pipes is same
Loss of head and velocity of flow in both the pipes is same

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